Hi Steve. I understand your problem. I have a similar one; in my case the calculations and the installation were easy, but I'd like to measure the exact angular positions of the (installed) loudspeakers.
First you need the angular positions of the loudspeakers from the listening spot. It shouldn't be too difficult to calculate for your layout, knowing the properties of the dodecahedron (and some trigonometry). Then you'd need some tool to report the angular positions on the walls, ceiling and floor, as seen from the listening spot. It could also be used to measure the installed loudspeaker positions. I suppose it could be made with a levelled tripod that can display horizontal angle positions, a "tiltable" plate with and inclinometer (or clinometer) to display vertical positions, and a laser pointer to report the positions, making sure that the pointer is perfectly installed on the plate and that the intersection of both axis is at the listening spot. For the distances, a soft measuring tape could be attached to the end of the plate. I hope it make sense... I found a few clinometer apps for mobile devices that are cheaper than digital clinometers. There's also analog clinometers (like those for satellite dish installation), and it's possible to build one. Maybe there's an easier solution. -- Marc Fri, 11 Jul 2014 02:00:25 +0100, Steve Boardman <[email protected]> wrote : > > You can use "golden rectangles" (of ratio 1/1.618) to calculate > > placements of your speakers. You can refer to: > > https://en.wikipedia.org/wiki/Icosahedron > > https://en.wikipedia.org/wiki/Dodecahedron > > https://en.wikipedia.org/wiki/Golden_rectangle > > > > -- > > Marc > > Hi Mark > > Of course, but not sure how easy this may be in practice. > Would I use the first golden rectangle on the smallest plane, and > intersect the others with that. Then use each rectangle corner as a > line from centre until it hits reaches a wall and then mark the > speaker position? The problem I have is the room has a sloping > ceiling, low at front and then high at the back. I would prefer to > extend the angles and attach speakers to the boundaries rather than > build a frame to hold them, as that would use up space and become an > obstruction. It is also easier to attach to walls and ceiling. I was > thinking of having the face of a Dodecahedron on the floor. This way > there will be less obstruction in the room and I will only have to > embed one speaker in the floor (i'm using both the vertices and faces > of dodecahedron). Does anyone know of a simpler and maybe more > accurate method? > > Thanks > > Steve _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
